三维数字图像相关法在带孔洞试件力学行为研究中的应用  

Application of 3D digital image correlation method in mechanical behavior of specimens with holes

作　　者：喻苏婷 蒋明[1] YU Suting;JIANG Ming(School of Civil Engineering,SUST,Suzhou 215011,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011

出　　处：《苏州科技大学学报（自然科学版）》2022年第1期41-46,共6页Journal of Suzhou University of Science and Technology（Natural Science Edition）

基　　金：国家自然科学基金资助项目(11172193)。

摘　　要：为研究不同形状的孔洞边缘区域应变分布规律,将三维光学全场应变测量系统与试验机同步,实时获取在拉伸荷载作用下孔洞边缘区域的变形图像。运用三维数字图像相关法计算不同形状的孔洞边缘区域全场应变分布。结果表明,孔洞的高宽比越小,应变越集中;菱形和椭圆形孔洞高宽比相同时,菱形孔洞应变更加集中。To study the strain distribution of the marginal regions of different shaped holes,we synchronized a three-dimensional optical full-field strain measurement system with the testing machine to obtain real-time deformation images of the marginal regions of the hole under tensile load.Three-dimensional digital image correlation method was used to calculate the full-field strain distribution in the marginal regions of different shaped holes.The results show that the smaller the ratio of height to width of the hole is,the more concentrated the strain becomes.When the ratios of height to width of the diamond and oval holes are the same,the strain of the diamond hole is more concentrated.

关 键 词：孔洞 应变分布 应变集中 三维数字图像相关法 

分 类 号：O343.4[理学—固体力学]